Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc269ca26bd725c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 01:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ccb86a4b9342250ba402d2a420377827 SHA-1: b5d27251ff3329f51f4438545978a04e346875f4 SHA-256: bfc269ca26bd725c91011b9346b779573983042fe2e7eef23c3a03f8199bd979
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO spam tactic to direct users to potentially malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/123?utm_term=massey+ferguson+35+diesel+engine+parts PDF link annotation
    • https://fufefofixikulo.weebly.com/uploads/1/3/1/1/131163927/xuduwuj.pdfIn PDF document text
    • http://tk-pobeda.site/sog_throwing_knives_amazonfgpr3.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/surodavitu.pdfIn PDF document text
    • http://gratoraama.website/maruzijig049kt.pdfIn PDF document text
    • https://nosekixiruwem.weebly.com/uploads/1/3/1/3/131380944/8b6d590f6.pdfIn PDF document text
    • https://tazujunage.weebly.com/uploads/1/3/5/3/135318046/dokeragudaf_rinozer.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/3346630.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/3535238.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/hivKvlZ/motorcycle_adventure_boots_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/hghin5L/rikagobilerodobutujij.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/hiAqnia/era_of_celestials_mod_apk.pdfIn PDF document text
    • https://rowisinudusa.weebly.com/uploads/1/3/5/3/135310113/c8c41653b0433ee.pdfIn PDF document text
    • http://siankaanmexico.com/bajrangi_bhaijaan_songs_zipwq47x.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/hhjirX3/air_hockey_challenge_mod_apk_unlimited_money.pdfIn PDF document text
    • http://healthyforczechrepublic.site/32740243265skxq1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lebaxa/goxofupimadupabokubilik.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/modul_akuntansi_keuangan_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/laws_of_armed_conflict.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/lasukejeduledanomuro.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/gst_annual_return_excel_sheet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA9 5488 bytes
SHA-256: 7e78d176317b1c725d5fe086f4fe27aefa5f207e792e0e4430a643ce4cff6dc4
font_01_sfnt_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 11116 bytes
SHA-256: 14660c889665f37a106b750c544d78217a9ebc00a561b315500b4cb84a286b75
font_02_sfnt_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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